Illinois
2,821 jurisdictions across counties, municipalities, and townships.
Counties 102
Municipalities 1,294
- City of North Chicago pop. 30,029
- City of Northlake pop. 12,664
- City of O Fallon pop. 32,292
- City of Oak Forest pop. 26,793
- City of Oakbrook Terrace pop. 2,725
- City of Oakland pop. 732
- City of Oglesby pop. 3,660
- City of Olney pop. 8,692
- City of Oneida pop. 684
- City of Oregon pop. 3,592
- City of Orient pop. 323
- City of Ottawa pop. 18,749
- City of Palos Heights pop. 11,819
- City of Palos Hills pop. 18,117
- City of Pana pop. 5,262
- City of Paris pop. 8,140
- City of Park City pop. 7,867
- City of Park Ridge pop. 38,810
- City of Paxton pop. 4,459
- City of Pekin pop. 31,448
- City of Peoria pop. 111,666
- City of Peru pop. 9,842
- City of Petersburg pop. 2,231
- City of Pinckneyville pop. 5,198
- City of Pittsfield pop. 4,193
- City of Plano pop. 12,191
- City of Polo pop. 2,262
- City of Pontiac pop. 11,359
- City of Princeton pop. 7,716
- City of Prophetstown pop. 1,929
- City of Prospect Heights pop. 15,691
- City of Quincy pop. 39,131
- City of Red Bud pop. 3,684
- City of Robinson pop. 7,187
- City of Rochelle pop. 9,367
- City of Rock Falls pop. 8,724
- City of Rock Island pop. 36,636
- City of Rockford pop. 147,711
- City of Rolling Meadows pop. 23,781
- City of Roodhouse pop. 1,545
- City of Rosiclare pop. 966
- City of Rushville pop. 3,026
- City of Salem pop. 7,187
- City of Sandwich pop. 7,178
- City of Savanna pop. 2,909
- City of Sesser pop. 1,865
- City of Shawneetown pop. 1,054
- City of Shelbyville pop. 4,609
- City of Silvis pop. 7,952
- City of South Beloit pop. 7,932
Townships 1,425
- Township of Osceola pop. 878
- Township of Osco pop. 423
- Township of Oskaloosa pop. 338
- Township of Oswego pop. 56,851
- Township of Otego pop. 1,489
- Township of Ottawa pop. 11,185
- Township of Otter Creek pop. 2,659
- Township of Otter Creek pop. 868
- Township of Otto pop. 2,108
- Township of Owego pop. 301
- Township of Owen pop. 3,599
- Township of Oxford pop. 1,149
- Township of Palatine pop. 111,886
- Township of Palestine pop. 1,133
- Township of Palmyra pop. 2,870
- Township of Palos pop. 55,667
- Township of Pana pop. 6,119
- Township of Panola pop. 375
- Township of Panther Creek pop. 295
- Township of Papineau pop. 436
- Township of Paradise pop. 972
- Township of Paris pop. 9,037
- Township of Parker pop. 161
- Township of Partridge pop. 578
- Township of Patoka pop. 932
- Township of Patterson pop. 395
- Township of Patton pop. 5,242
- Township of Paw Paw pop. 312
- Township of Pawnee pop. 3,000
- Township of Payson pop. 1,722
- Township of Pea Ridge pop. 189
- Township of Peach Orchard pop. 554
- Township of Pearl pop. 196
- Township of Pecatonica pop. 4,109
- Township of Pekin pop. 27,299
- Township of Pella pop. 157
- Township of Pembroke pop. 1,785
- Township of Pendleton pop. 1,141
- Township of Penn pop. 310
- Township of Penn pop. 87
- Township of Pennsylvania pop. 154
- Township of Peoria City pop. 96,531
- Township of Peotone pop. 4,382
- Township of Perry pop. 481
- Township of Perryton pop. 453
- Township of Persifer pop. 1,068
- Township of Peru pop. 10,085
- Township of Pesotum pop. 868
- Township of Petty pop. 621
- Township of Phenix pop. 1,681